031
WHHW40 PHFO 071457
CFWHFO

Coastal Hazard Message
National Weather Service Honolulu HI
457 AM HST Mon Sep 7 2026

...HIGH SURF WARNING FOR SOUTH FACING SHORES OF ALL ISLANDS
THROUGH TUESDAY...
...HIGH SURF WARNING FOR WEST FACING SHORES OF BIG ISLAND THROUGH
TUESDAY...
...HIGH SURF ADVISORY FOR EAST FACING SHORES OF ALL ISLANDS
THROUGH TUESDAY...

South-southwest swell from Hurricane Lowell is expected to rise
rapidly today and peak tonight, bringing warning level surf to
south facing shores. This swell may shift out of the southwest by
tonight. A sharp gradient in swell is expected from west to east,
with damaging surf for portions of Kauai County and possibly
Oahu. Swell energy is expected to rapidly decline on Tuesday,
though advisory level surf may persist through Tuesday morning.

A large, medium-period east swell from former Tropical Storm
Karina will also persist through Tuesday and combine with
increasing east to southeast wind swell from Hurricane Lowell,
producing advisory level surf along east facing shores.

HIZ030-080400-
/O.CAN.PHFO.SU.W.0011.000000T0000Z-260909T0400Z/
/O.EXA.PHFO.SU.Y.0036.000000T0000Z-260909T0400Z/
Kauai East-
457 AM HST Mon Sep 7 2026

...HIGH SURF ADVISORY IN EFFECT UNTIL 6 PM HST TUESDAY...
...HIGH SURF WARNING IS CANCELLED...

* WHAT...Surf of 7 to 10 feet.

* WHERE...East facing shores of Kauai.

* WHEN...Until 6 PM HST Tuesday.

* IMPACTS...Moderate. Strong breaking waves and strong currents
  will make swimming dangerous.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Heed all advice from ocean safety officials. When in doubt, don`t
go out.

&&

$$

HIZ001-003-031-080400-
/O.CON.PHFO.SU.W.0011.000000T0000Z-260909T0400Z/
Niihau-Kauai Southwest-Kauai South-
457 AM HST Mon Sep 7 2026

...HIGH SURF WARNING REMAINS IN EFFECT UNTIL 6 PM HST TUESDAY...

* WHAT...Surf of 7 to 10 feet rapidly building to 20 to 30 feet
  Monday afternoon and evening.

* WHERE...South facing shores of Kauai and Niihau.

* WHEN...Until 6 PM HST Tuesday.

* IMPACTS...Extreme...Expect ocean water surging and sweeping over
  beaches, coastal benches, and roadways, creating the potential
  for significant damage to coastal properties and infrastructure,
  including roadways. Coastal evacuations and road closures are
  possible. Large breaking waves may affect harbor entrances and
  channels with significant damage possible to docks, piers,
  ramps, and boats.

* ADDITIONAL DETAILS...Vulnerable coastal roadways from Poipu to
  Kekaha are susceptible to overwash, with Lawai Road at a
  particular risk for overwash.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Stay away from the shoreline along the affected coasts. Be
prepared for road closures. Postpone entering or leaving channels
affected by the high surf until the surf subsides.

&&

$$

HIZ006-016-018-023-026-032>034-038-040-041-043-044-046-048>052-
080400-
/O.CON.PHFO.SU.W.0011.000000T0000Z-260909T0400Z/
Waianae Coast-Kahoolawe-Maui Leeward West-Kona-Kohala-
East Honolulu-Honolulu Metro-Ewa Plain-Molokai Southeast-
Molokai West-Molokai Leeward South-Lanai Leeward-Lanai South-
Maui Central Valley South-Kipahulu-South Maui/Upcountry-
South Haleakala-Big Island South-Big Island Southeast-
457 AM HST Mon Sep 7 2026

...HIGH SURF WARNING REMAINS IN EFFECT UNTIL 6 PM HST TUESDAY...

* WHAT...For south facing shores, surf of 7 to 10 feet rapidly
  building Monday afternoon and evening up to 15 to 25 feet for
  Oahu, 12 to 20 feet for Maui County, and 12 to 16 feet for the
  Big Island. For west facing shores of the Big Island, surf of 6
  to 8 feet rapidly building Monday afternoon and evening to 12 to
  16 feet.

* WHERE...South facing shores of Kahoolawe, Lanai, Maui, Molokai,
  Oahu and the Big Island. West facing shores of the Big Island.

* WHEN...Until 6 PM HST Tuesday.

* IMPACTS...Very High...Expect ocean water surging and sweeping
  across beaches, coastal benches, and lava flows creating the
  potential for impacts to coastal properties and infrastructure,
  including roadways. Powerful longshore and rip currents will be
  present at most beaches. Large breaking waves and strong
  currents may impact harbor entrances and channels causing
  challenging boat handling.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Stay away from the shoreline along the affected coasts. Be
prepared for road closures. Postpone entering or leaving channels
affected by the high surf until the surf subsides.

&&

$$

HIZ009-035-037-047-053-054-080400-
/O.CON.PHFO.SU.Y.0036.000000T0000Z-260909T0400Z/
Olomana-Koolau Windward-Molokai Windward-Windward Haleakala-
Big Island East-Big Island North-
457 AM HST Mon Sep 7 2026

...HIGH SURF ADVISORY REMAINS IN EFFECT UNTIL 6 PM HST TUESDAY...

* WHAT...Surf of 7 to 10 feet.

* WHERE...East facing shores of Oahu, Molokai, Maui, and Big
  Island.

* WHEN...Until 6 PM HST Tuesday.

* IMPACTS...Moderate. Strong breaking waves and strong currents
  will make swimming dangerous.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Heed all advice from ocean safety officials. When in doubt, don`t
go out.

&&

$$